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/*
* (C) 2007 by Pablo Neira Ayuso <pablo@netfilter.org>
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
*/
#include "internal.h"
static int cmp_orig(const struct nf_conntrack *ct1,
const struct nf_conntrack *ct2)
{
if (test_bit(ATTR_ORIG_IPV4_SRC, ct1->set) &&
test_bit(ATTR_ORIG_IPV4_SRC, ct2->set) &&
ct1->tuple[__DIR_ORIG].src.v4 !=
ct2->tuple[__DIR_ORIG].src.v4)
return 0;
if (test_bit(ATTR_ORIG_IPV4_DST, ct1->set) &&
test_bit(ATTR_ORIG_IPV4_DST, ct2->set) &&
ct1->tuple[__DIR_ORIG].dst.v4 !=
ct2->tuple[__DIR_ORIG].dst.v4)
return 0;
if (test_bit(ATTR_ORIG_IPV6_SRC, ct1->set) &&
test_bit(ATTR_ORIG_IPV6_SRC, ct2->set) &&
memcmp(&ct1->tuple[__DIR_ORIG].src.v6,
&ct2->tuple[__DIR_ORIG].src.v6,
sizeof(u_int32_t)*4) == 0)
return 0;
if (test_bit(ATTR_ORIG_IPV6_DST, ct1->set) &&
test_bit(ATTR_ORIG_IPV6_DST, ct2->set) &&
memcmp(&ct1->tuple[__DIR_ORIG].dst.v6,
&ct2->tuple[__DIR_ORIG].dst.v6,
sizeof(u_int32_t)*4) == 0)
return 0;
if (test_bit(ATTR_ORIG_L3PROTO, ct1->set) &&
test_bit(ATTR_ORIG_L3PROTO, ct2->set) &&
ct1->tuple[__DIR_ORIG].l3protonum != AF_UNSPEC &&
ct2->tuple[__DIR_ORIG].l3protonum != AF_UNSPEC &&
ct1->tuple[__DIR_ORIG].l3protonum !=
ct2->tuple[__DIR_ORIG].l3protonum)
return 0;
if (test_bit(ATTR_ORIG_L4PROTO, ct1->set) &&
test_bit(ATTR_ORIG_L4PROTO, ct2->set) &&
ct1->tuple[__DIR_ORIG].protonum !=
ct2->tuple[__DIR_ORIG].protonum)
return 0;
return 1;
}
static int cmp_repl(const struct nf_conntrack *ct1,
const struct nf_conntrack *ct2)
{
if (test_bit(ATTR_REPL_IPV4_SRC, ct1->set) &&
test_bit(ATTR_REPL_IPV4_SRC, ct2->set) &&
ct1->tuple[__DIR_REPL].src.v4 !=
ct2->tuple[__DIR_REPL].src.v4)
return 0;
if (test_bit(ATTR_REPL_IPV4_DST, ct1->set) &&
test_bit(ATTR_REPL_IPV4_DST, ct2->set) &&
ct1->tuple[__DIR_REPL].dst.v4 !=
ct2->tuple[__DIR_REPL].dst.v4)
return 0;
if (test_bit(ATTR_REPL_IPV6_SRC, ct1->set) &&
test_bit(ATTR_REPL_IPV6_SRC, ct2->set) &&
memcmp(&ct1->tuple[__DIR_REPL].src.v6,
&ct2->tuple[__DIR_REPL].src.v6,
sizeof(u_int32_t)*4) == 0)
return 0;
if (test_bit(ATTR_REPL_IPV6_DST, ct1->set) &&
test_bit(ATTR_REPL_IPV6_DST, ct2->set) &&
memcmp(&ct1->tuple[__DIR_REPL].dst.v6,
&ct2->tuple[__DIR_REPL].dst.v6,
sizeof(u_int32_t)*4) == 0)
return 0;
if (test_bit(ATTR_REPL_L3PROTO, ct1->set) &&
test_bit(ATTR_REPL_L3PROTO, ct2->set) &&
ct1->tuple[__DIR_REPL].l3protonum != AF_UNSPEC &&
ct2->tuple[__DIR_REPL].l3protonum != AF_UNSPEC &&
ct1->tuple[__DIR_REPL].l3protonum !=
ct2->tuple[__DIR_REPL].l3protonum)
return 0;
if (test_bit(ATTR_REPL_L4PROTO, ct1->set) &&
test_bit(ATTR_REPL_L4PROTO, ct2->set) &&
ct1->tuple[__DIR_REPL].protonum !=
ct2->tuple[__DIR_REPL].protonum)
return 0;
return 1;
}
static int cmp_meta(const struct nf_conntrack *ct1,
const struct nf_conntrack *ct2)
{
if (test_bit(ATTR_MARK, ct1->set) &&
test_bit(ATTR_MARK, ct2->set) &&
ct1->mark != ct2->mark)
return 0;
if (test_bit(ATTR_TIMEOUT, ct1->set) &&
test_bit(ATTR_TIMEOUT, ct2->set) &&
ct1->timeout != ct2->timeout)
return 0;
if (test_bit(ATTR_STATUS, ct1->set) &&
test_bit(ATTR_STATUS, ct2->set) &&
ct1->status == ct2->status)
return 0;
if (test_bit(ATTR_TCP_STATE, ct1->set) &&
test_bit(ATTR_TCP_STATE, ct2->set) &&
ct1->protoinfo.tcp.state != ct2->protoinfo.tcp.state)
return 0;
return 1;
}
int __compare(const struct nf_conntrack *ct1,
const struct nf_conntrack *ct2,
unsigned int flags)
{
if (flags == NFCT_CMP_ALL)
return cmp_orig(ct1, ct2) &&
cmp_repl(ct1, ct2) &&
cmp_meta(ct1, ct2);
if (flags & NFCT_CMP_ORIG && !cmp_orig(ct1, ct2))
return 0;
if (flags & NFCT_CMP_REPL && !cmp_repl(ct1, ct2))
return 0;
return 1;
}
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